Added custom css rule to remove underline from eq. and footnote links.

_static/TI.css

@@ -11,3 +11,8 @@ div.exercise p.admonition-title::before {
     /*content: "\f303";*/
     content: none;
 }
+
+/* Remove the underline from internal links. */
+a.internal, a.footnote-reference {
+    text-decoration: none;
+}
\ No newline at end of file